Chrysanthemum plant named ‘G21SOU01WH’

ABSTRACT

A new and distinct cultivar of  Chrysanthemum  plant named ‘G21SOU01WH’, characterized by its upright, outwardly spreading and uniformly rounded plant habit; moderately vigorous growth habit; freely branching habit; dense and full plant habit; flexible stems; dark green-colored leaves; uniform and freely flowering habit; long flowering period; medium-sized decorative-type inflorescences with ray florets that are initially light pale yellow in color becoming white with development; and excellent garden performance.

Botanical designation: Chrysanthemum x morifolium.

Cultivar denomination: ‘G21SOU01WH’.

CROSS-REFERENCED TO CLOSELY-RELATED APPLICATIONS

Title: Chrysanthemum Plant Named ‘G21SOU11OR’

Applicant: Elien Sofie Pieters

Filed: Concurrently with the instant application having application Ser. No. 16/873,480

Title: Chrysanthemum Plant Named ‘G21SOU06PI’

Applicant: Elien Sofie Pieters

Filed: Concurrently with the instant application having application Ser. No. 16/873,481

Title: Chrysanthemum Plant Named ‘G21SOU14RE’

Applicant: Elien Sofie Pieters

Filed: Concurrently with the instant application having application Ser. No. 16/873,463

Title: Chrysanthemum Plant Named ‘G21SOU04YE’

Applicant: Elien Sofie Pieters

Filed: Concurrently with the instant application having application Ser. No. 16/873,466

STATEMENT REGARDING PRIOR DISCLOSURES BY INVENTOR/APPLICANT

At the filing of this application, no Plant Breeder's Rights applications for the instant plant have been filed by the Applicant/Inventor nor by the Assignee, Paraty B.V.B.A. of Oostnieuwkerke, Belgium.

There have been no offers for sale anywhere in the world prior to the effective filing date of this Application and no accessibility to one of ordinary skill in the art.

The Inventor/Applicant asserts that no publications nor advertisements relating to sales, offers for sale or public distribution occurred more than one year prior to the effective filing date of this application. Any information about the claimed plant would have been obtained from a direct or indirect disclosure from the Inventor. Applicant claims a prior art exemption under 35 U.S.C. 102(b)(1) for disclosure and/or sales prior to the filing date but less than one year prior to the effective filing date.

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct cultivar of Chrysanthemum plant, botanically known as Chrysanthemum x morifolium and hereinafter referred to by the name ‘G21SOU01WH’.

The new Chrysanthemum plant is a product of a planned breeding program conducted by the Inventor in Oostnieuwkerke, Belgium. The objective of the breeding program is to create new uniformly mounding and freely flowering Chrysanthemum plants with unique and attractive inflorescence form and ray floret coloration.

The new Chrysanthemum plant is a naturally-occurring whole plant mutation of Chrysanthemum x morifolium ‘Tonato Pink’, not patented. The new Chrysanthemum plant was discovered and selected by the Inventor as a single flowering plant from within a population of plants of ‘Tonato Pink’ in a controlled greenhouse environment in Oostnieuwkerke, Belgium in October, 2018.

Asexual reproduction of the new Chrysanthemum plant by vegetative terminal cuttings was first conducted in a controlled greenhouse environment in Oostnieuwkerke, Belgium in January, 2019. Asexual reproduction by vegetative terminal cuttings has shown that the unique features of this new Chrysanthemum plant are stable and reproduced true to type in successive generations.

SUMMARY OF THE INVENTION

The following traits have been repeatedly observed and are determined to be the unique characteristics of ‘G21SOU01WH’. These characteristics in combination distinguish ‘G21SOU01WH’ as a new and distinct Chrysanthemum plant:

-   -   1. Upright, outwardly spreading and uniformly rounded plant         habit; moderately vigorous growth habit.     -   2. Freely branching habit; dense and full plant habit; flexible         stems.     -   3. Relatively small dark green-colored leaves.     -   4. Uniform and freely flowering habit.     -   5. Long flowering period.     -   6. Medium-sized decorative-type inflorescences with ray florets         that are initially light pale yellow in color becoming white         with development.     -   7. Excellent garden performance.

Plants of the new Chrysanthemum can be compared to plants of the mutation parent, ‘Tonato Pink’. In side-by-side comparisons, plants of the new Chrysanthemum differ primarily from plants of ‘Tonato Pink’ in ray floret color as ray florets of plants of the new Chrysanthemum are initially light pale yellow in color becoming white with development whereas ray florets of plants of ‘Tonato Pink’ are initially dark pink in color becoming light pink with development.

Plants of the new Chrysanthemum can be compared to plants of the Chrysanthemum x morifolium ‘G21SOU11OR’, disclosed in a U.S. Plant Patent application filed concurrently having application Ser. No. 16/873,480. In side-by-side comparisons, plants of the new Chrysanthemum differ primarily from plants of ‘G21SOU11OR’ in ray floret color as ray florets of plants of the new Chrysanthemum are initially light pale yellow in color becoming white with development whereas ray florets of plants of ‘G21SOU11OR’ are initially red in color becoming golden orange with development.

Plants of the new Chrysanthemum can be compared to plants of the Chrysanthemum x morifolium ‘G21SOU06PI’, disclosed in a U.S. Plant Patent application filed concurrently having application Ser. No. 16/873,481. In side-by-side comparisons, plants of the new Chrysanthemum differ primarily from plants of ‘G21SOU06PI’ in ray floret color as ray florets of plants of the new Chrysanthemum are initially light pale yellow in color becoming white with development whereas ray florets of plants of ‘G21SOU06PI’ are initially red in color becoming light purple with development.

Plants of the new Chrysanthemum can be compared to plants of the Chrysanthemum x morifolium ‘G21SOU14RE’, disclosed in a U.S. Plant Patent application filed concurrently having application Ser. No. 16/873,463. In side-by-side comparisons, plants of the new Chrysanthemum differ primarily from plants of ‘G21SOU14RE’ in ray floret color as ray florets of plants of the new Chrysanthemum are initially light pale yellow in color becoming white with development whereas ray florets of plants of ‘G21SOU14RE’ are initially dark red in color becoming lighter red with development.

Plants of the new Chrysanthemum can be compared to plants of the Chrysanthemum x morifolium ‘G21SOU04YE’, disclosed in a U.S. Plant Patent application filed concurrently having application Ser. No. 16/873,466. In side-by-side comparisons, plants of the new Chrysanthemum differ primarily from plants of ‘G21SOU04YE’ in ray floret color as ray florets of plants of the new Chrysanthemum are initially light pale yellow in color becoming white with development whereas ray florets of plants of ‘G21SOU04YE’ are bright yellow in color.

Plants of the new Chrysanthemum can also be compared to plants of Chrysanthemum x morifolium ‘Jasoda White’, disclosed in U.S. Plant Pat. No. 21,884. In side-by-side comparisons, plants of the new Chrysanthemum differ primarily from plants of ‘Jasoda White’ in the following characteristics:

-   -   1. Plants of the new Chrysanthemum are slightly flatter than and         not as ball-shaped as plants of ‘Jasoda White’.     -   2. Leaves of plants of the new Chrysanthemum are brighter green         in color than leaves of plants of ‘Jasoda White’.     -   3. Plants of the new Chrysanthemum flower about two weeks later         than plants of ‘Jasoda White’.

BRIEF DESCRIPTION OF THE PHOTOGRAPH

The accompanying photograph illustrates the overall appearance of the new Chrysanthemum plant showing the colors as true as it is reasonably possible to obtain in colored reproductions of this type. The photograph comprises a side perspective view of a typical flowering plant of ‘G21SOU01WH’ grown in a container.

DETAILED BOTANICAL DESCRIPTION

The aforementioned photograph and following observations and measurements describe plants grown in 19-cm containers in an outdoor nursery in Oostnieuwkerke, Belgium under natural daylengths during the autumn and under cultural practices generally used in commercial Chrysanthemum production. During the production of the plants, day temperatures ranged from 20° C. to 25° C. and night temperatures ranged from 12° C. to 18° C. Plants were 20 weeks old when the photograph and detailed description were taken. In the following description, color references are made to The Royal Horticultural Society Colour Chart, 2015 Edition, except where general terms of ordinary dictionary significance are used.

-   Botanical classification: Chrysanthemum x morifolium ‘G21SOU01WH’. -   Parentage: Naturally-occurring whole plant mutation of Chrysanthemum     x morifolium ‘Tonato Pink’, not patented. -   Propagation:     -   -   Type cutting.—By vegetative tip cuttings.         -   Time to initiate roots, summer.—About two weeks at             temperatures about 20° C.         -   Time to initiate roots, winter.—About 20 days at             temperatures about 20° C.         -   Time to produce a rooted young plant, summer.—About 30 days             at temperatures about 20° C.         -   Time to produce a rooted young plant, winter.—About 40 days             at temperatures about 20° C.         -   Root description.—Fine, fibrous; typically light brown in             color, actual color of the roots is dependent on substrate             composition, water quality, fertilizer type and formulation,             substrate temperature and physiological age of roots.         -   Rooting habit.—Freely branching; medium density. -   Plant description:     -   -   Appearance.—Perennial decorative-type Chrysanthemum with             oblong ray florets; stems upright and outwardly spreading             giving a uniformly rounded appearance to the plant; plants             roughly spherical; very freely branching habit, about 25 to             30 primary lateral branches develop, each primary lateral             branch with multiple secondary branches; pinching enhances             lateral branch development; dense and full plant habit;             moderately vigorous growth habit; moderate growth rate;             plants flexible, not brittle.         -   Plant height.—About 40 cm.         -   Plant width.—About 50 cm.         -   Lateral branches.—Length: About 25 cm. Diameter: About 2 mm             to 3 mm. Internode length: About 2 cm. Strength: Moderately             strong, flexible. Texture: Pubescent, fine; longitudinally             ridged. Color: Close to 137A.         -   Leaves.—Arrangement: Alternate, simple. Length: About 3 cm             to 5 cm. Width: About 2.5 cm to 3 cm. Apex: Rounded to             cuspidate. Base: Attenuate. Margin: Palmately lobed and             serrate, sinuses between lateral lobes divergent to             parallel. Texture, upper and lower surfaces: Slightly             pubescent. Venation: Palmately reticulate. Color: Developing             leaves, upper surface: Close to 137C. Developing leaves,             lower surface: Close to 137D. Fully expanded leaves, upper             surface: Close to N137C; venation, close to 148C. Fully             expanded leaves, lower surface: Close to 147B; venation,             close to 147B to 147C. Petioles: Length: About 1 cm.             Diameter: About 2 mm. Texture, upper and lower surfaces:             Slightly pubescent; slightly rough. Color, upper surface:             Close to 146C. Color, lower surface: Close to 146D.             Stipules: Length: About 1 cm. Diameter: About 2 mm. Texture,             upper and lower surfaces: Slightly pubescent. Color, upper             and lower surfaces: Close to 137A. -   Inflorescence description:     -   -   Appearance.—Decorative-type inflorescence form;             inflorescences borne on terminals above foliar plane; disc             and ray florets arranged acropetally on a capitulum.         -   Fragrance.—Slightly fragrant, pungent.         -   Flowering response.—Under natural season conditions, plants             flower in mid-October in Belgium; flowering response time,             about 40 days.         -   Postproduction longevity.—Inflorescences maintain good color             and substance for about 42 days; inflorescences persistent.         -   Quantity of inflorescences.—About 30 to 35 inflorescences             develop per lateral branch.         -   Inflorescence buds.—Height: About 9 mm. Diameter: About             1.4 cm. Shape: Globular. Color: Close to 8C.         -   Inflorescence diameter.—About 4 cm.         -   Inflorescence depth (height).—About 3.5 cm.         -   Disc diameter.—About 3 mm; inconspicuous.         -   Receptacle diameter.—About 3 mm.         -   Receptacle height.—About 2.5 mm to 3 mm.         -   Receptacle color.—Close to 144B.         -   Ray florets.—Number of ray florets per inflorescence: About             150 to 200 arranged in about ten whorls. Length: About 3.5             cm to 5 cm. Width: About 7 mm. Shape: Oblong. Apex: Rounded.             Base: Attenuate. Margin: Entire. Aspect: Mostly horizontal.             Texture and luster, upper and lower surfaces: Smooth,             glabrous; matte. Color: When opening, upper surface: Close             to 8C. When opening, lower surface: Close to 8D. Fully             opened, upper surface: Close to 155A; venation, close to             155A; color becoming closer to NN155A with development.             Fully opened, lower surface: Close to NN155A; venation,             close to NN155A; color does not change with development.         -   Disc florets.—Number of disc florets per inflorescence:             About 20 massed at the center of the inflorescence. Length:             About 3 mm. Diameter: About 0.5 mm to 1 mm. Shape: Tubular;             apices dentate. Texture and luster: Smooth, glabrous;             glossy. Color, immature: Close to 145A. Color, mature: Close             to 12A.         -   Phyllaries.—Number of phyllaries per inflorescence: About 25             arranged in two or three whorls. Length: About 4 mm to 6 mm.             Width: About 2 mm to 3 mm. Shape: Ovate. Apex: Rounded.             Base: Rounded to truncate. Margin: Entire. Texture, upper             and lower surfaces: Smooth, glabrous. Color, upper surface:             Close to 137A. Color, lower surface: Close to N137B.         -   Peduncles.—Length, terminal peduncle: About 5 cm. Length,             fourth peduncle: About 5 cm. Length, seventh peduncle: About             5 cm. Diameter: About 2 mm. Angle: About 30° from vertical.             Strength: Moderately strong. Texture: Slightly pubescent.             Color: Close to 137C.         -   Reproductive organs.—Androecium: Stamen development has not             been observed on inflorescences of the new Chrysanthemum.             Gynoecium: Pistil development has not been observed on             inflorescences of the new Chrysanthemum.         -   Seeds and fruits.—To date seed and fruit production have not             been observed on plants of the new Chrysanthemum. -   Garden performance: Plants of the new Chrysanthemum have     demonstrated excellent garden performance and will tolerate     temperatures ranging from about 1° C. to about 45° C. 

It is claimed:
 1. A new and distinct Chrysanthemum plant named ‘G21SOU01WH’ as illustrated and described. 